Tim Bachman left the band in early 1974 shortly after the release of Bachman–Turner Overdrive II. B.T.O. continued a very busy tour schedule and during the supporting tour for BTO II, Tim was replaced by Blair Thornton, who had been in the Vancouver-based band Crosstown Bus. The first album with the modified lineup, 1974’s Not Fragile (a play on the hit album Fragile by Yes), became a massive hit and reached #1 on the Canadian and U.S. album charts. It included the #1 single "You Ain't Seen Nothing Yet" and AOR favorite "Roll On Down the Highway". The band continued to steadily produce successful albums through the mid-1970s including Four Wheel Drive and Head On (both 1975). Each of these albums produced a hit single: "Hey You" (from Four Wheel Drive) and "Take It Like A Man" (from Head On)

#33 in 1976- how about today?